E03F 2201/40
Means for indicating blockage in sewer systems
E03F2201/40 (Means for indicating blockage in sewer systems) appears on 58 US grants and 60 published applications in this corpus.
Search patents in E03F- Granted patents
- 58
- Published applications
- 60
- Assignees
- 34
- Inventors
- 145
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 2 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 3 |
| 2014 | 1 | 4 |
| 2015 | 2 | 5 |
| 2016 | 3 | 3 |
| 2017 | 3 | 3 |
| 2018 | 5 | 5 |
| 2019 | 1 | 0 |
| 2020 | 3 | 4 |
| 2021 | 3 | 7 |
| 2022 | 3 | 5 |
| 2023 | 3 | 3 |
| 2024 | 5 | 5 |
| 2025 | 4 | 3 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Material regulating trap for sewer connection4 Aug 2026US 12,698,624 B2
- Sewer cap monitoring system21 Jul 2026US 12,687,417 B1QuadSprout Technologies LLC
- Material regulating trap for sewer connection4 Nov 2025US 12,460,404 B1
- Duct blockage risk location prediction15 Apr 2025US 12,277,648 B2British Telecommunications Public Ltd.Co.
- Toilet management system and management device8 Apr 2025US 12,270,191 B2LIXIL Corporation
- Sewer cap monitoring system17 Sep 2026US 2026/0276427 A1QuadSprout Technologies LLC
- Drain line alert device27 Aug 2026US 2026/0250938 A1
- Sewer Cap Monitoring System23 Jul 2026US 2026/0210103 A1
- Sewer cap monitoring system23 Jul 2026US 2026/0210748 A1QuadSprout Technologies LLC
- Material regulating trap for sewer connection26 Feb 2026US 2026/0055594 A1Danny Warren Consulting, LLC
Most cited
By later US patents
- Sewer line restriction alarm placed in clean out plug40US 5,006,833 ACDF Corporation · 1991
- Sewage back-up alarm34US 4,392,128 A1983
- Flow imaging and monitoring for synchronized management of wide area drainage24US 9,541,432 B2The United States of America as represented by the Administrator of the U. S. Environmental Protection Agency · 2017
- Sewer line backup detection, alarm and detention apparatus23US 4,546,346 ASanity Saver Cap Company · 1985
- Sewer back up warning system21US 4,398,186 A1983